APA aipamena

Kunz, R. M. (1971). The challenge of life. Switzerland: Basel and Stutgart.

Chicago Style aipamena

Kunz, Robert M. The Challenge of Life. Switzerland: Basel and Stutgart, 1971.

MLA aipamena

Kunz, Robert M. The Challenge of Life. Switzerland: Basel and Stutgart, 1971.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.